Klas1 Windows of Kuusamo are a premium manufacturer of high quality movable insulated windows. Our guiding vision is to be able to offer the market a European window culture, combined with the specific requirements of Finland, and those of our individual clients.

Klas1 windows are used in the north for good reason, and they are manufactured in Finland. TPS and SS Technology isolates the glass along the side surfaces, taking traditional techniques of insulating glass a degree further. Klas1 windows meet demanding customer requirements, whether in their insulating abilities, protection from solar radiation, thermal protection, security, or the insulation of sound.

We manufacture products using the latest and best technology. We are specialized in prominent architectural sites and high quality leisure destinations. Klas1 windows are all built to a solidly opening design, typically with only two washable surfaces, and in some cases just one! Klas1 windows are suitable for the most demanding applications. Our windows are slender, offer an attractive light and great convenience as priority.